Opo"sums, Virginian, 377-81
Opo"sums, Woolly, 378-80
Opo"sums, Young (natural size), 379
Orang-utans, vii, viii (Introd.), 6-7-8
Orang"utans, First mention of, 5
Orang"utans, Habits of, 6
Orang"utans, Physical Description of, 5
Oribis, 242
Orloff, 203
Oryx, Beatrix, 250